Copper Bromide–Catalyzed C-Alkylation of 2-Amino-1,4-Naphthoquinone: New Synthesis of 1-Azaanthraquinones
作者:Ricardo A. Tapia、Juan Venegas、Lorena B. Cantuarias
DOI:10.1080/00397910902963421
日期:2009.12.15
Copper(I) bromide catalyzes the regioselective Michaeladditionreaction of 2-amino-1,4-naphthoquinone (5) with methyl vinyl ketone and 2-propenal to provide easy access to C-alkylated quinone derivatives, useful precursors of 1-azaanthraquinones.
Metal-Free Multicomponent Strategy for Amidine Synthesis
作者:Zayed Alassad、Anas AboRaed、Meital Shema Mizrachi、Mónica H. Pérez-Temprano、Anat Milo
DOI:10.1021/jacs.2c07918
日期:2022.11.16
preparation are in great demand. Specifically, their common structural core decorated with three substituents sets amidines as perfect candidates for multicomponentsynthesis. Herein, we present a highly modular metal-free multicomponent strategy for the synthesis of sulfonyl amidines. This work was focused on selecting readily accessible reagents to facilitate the in situ formation of enamines by the addition